The bruises that resulted from those assaults were noticed "over time" at the day care centre the child attended. Bruising on one arm, and a series of smaller bruises from his left shoulder to his wrist, were noted one day; bruising was seen on his face and behind his left ear seven days later, along with what appeared to be historic bruises on his back; and bruising was seen on the side of his face seven days after that, along with a bloodshot eye and grazing on his penis.
The defendant subsequently made an unsolicited comment to staff that the penis injury had been self-inflicted.
The defendant told police she was not responsible for the boy's injuries but offered no other reasonable explanation.
Defence lawyer Cathy Murray argued that the charges arose from a one-off incident that would not be repeated and that her client had done everything possible to make amends.
However, prosecutor Duncan Coleman said this was the type of behaviour that led to the death of young children.
The defendant, whose name was suppressed to protect the victim, was sentenced to six months' community detention and 18 months' intensive supervision.
Ms Murray told the court that her client was not trying to minimise her offending, but there was nothing she could have done to make amends that she had not done.
In reply, Judge Davis said the woman had offended against one of society's most vulnerable members over a "reasonably prolonged" period of time.
The child was now in his grandmother's care, Ms Murray added. The defendant now had supervised contact with the child, and had not breached that arrangement.
The grandmother told the court that the child was now happy and thriving.
Judge Davis finally accepted that the required punitive element of sentencing could be achieved without imprisonment, but told the defendant that those who chose to abuse children would not receive sympathy from his court.
"This was significant abuse and a breach of trust against someone who relied on you for their day to day needs," he said.
"This child suffered an orchestrated campaign of abuse and neglect."
The pre-sentence report had cited the defendant's lifestyle, associates, drug use and propensity for violence as factors behind her offending, but Judge Davis noted that she had made some progress in her life, including the recent gaining of employment.